Update the flags used with Emscripten

Makefile

@@ -92,10 +92,17 @@ OSTYPE := $(strip $(shell uname -s))
 ifneq (,$(strip $(findstring $(TARGETTYPE), WebAssembly)))
 	# WebAssembly
 	CXX = emcc
-	CFLAGS_EXEC += --shell-file ./emscripten/webnqc_shell.html -s INVOKE_RUN=0 -s MODULARIZE=1 -s EXPORT_NAME=createWebNqc -s EXPORTED_RUNTIME_METHODS='["callMain","FS"]'
 	OBJ_SUBDIR_NAME = wobj
 	EXEC_SUBDIR_NAME = wasm
 	EXEC_EXT = .html
+
+	# Documentation for various Emscripten flags
+	# - Full List:    https://github.com/emscripten-core/emscripten/blob/main/src/settings.js
+	# - Modularize:   https://emscripten.org/docs/getting_started/FAQ.html#can-i-use-multiple-emscripten-compiled-programs-on-one-web-page
+	# - Environment:  https://emscripten.org/docs/getting_started/FAQ.html#can-i-build-javascript-that-only-runs-on-the-web
+	# - Single File:  https://emscripten.org/docs/compiling/Building-Projects.html?highlight=SINGLE_FILE#emscripten-linker-output-files
+	CFLAGS_EXEC += --shell-file ./emscripten/webnqc_shell.html -s EXPORT_NAME=createWebNqc  -s EXPORTED_RUNTIME_METHODS='["callMain","FS"]' \
+		-s INVOKE_RUN=false  -s MODULARIZE=1  -s ENVIRONMENT=web  -s SINGLE_FILE
 else
 ifneq (,$(strip $(findstring $(OSTYPE), Darwin)))
 	# Mac OS X